Overview: 7 questions will be solved this time.Among them
           ☆7 integer calculations

[1/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 15×1
    Solution:
    15×1 = 15
    Column vertical calculation:

						1	5
✖							1
						1	5
						1	5

[2/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 71×8
    Solution:
    71×8 = 568
    Column vertical calculation:

						7	1
✖							8
					5	6	8
					5	6	8

[3/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 1×20
    Solution:
    1×20 = 20
    Column vertical calculation:

							1
✖						2	0
							0
						2
						2	0

[4/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 16×9
    Solution:
    16×9 = 144
    Column vertical calculation:

						1	6
✖							9
					1	4	4
					1	4	4

[5/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 15×6
    Solution:
    15×6 = 90
    Column vertical calculation:

						1	5
✖							6
						9	0
						9	0

[6/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 13×2
    Solution:
    13×2 = 26
    Column vertical calculation:

						1	3
✖							2
						2	6
						2	6

[7/7 Integer column vertical calculation]
    Question type: Integer multiplication
    Original question: 41×3
    Solution:
    41×3 = 123
    Column vertical calculation:

						4	1
✖							3
					1	2	3
					1	2	3

---

>>注：本次最多计算 7 道题。

Your problem has not been solved here? Please go to the Hot Problems section！